Calculate your one-rep max and training percentages
Configuration
Based on the Brzycki formula. Most accurate for 2-10 rep ranges.
Strength Analysis
About this calculator
Quick Reference
Strength85-100% 1RM
Hypertrophy70-85% 1RM
Endurance< 70% 1RM
Overview
The one-rep max (1RM) is the maximum weight you can lift for a single repetition. This calculator uses the Brzycki formula to estimate your 1RM based on submaximal lifts, which is safer than testing your actual maximum.
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Pro Tips
For accurate results, use a weight that allows 3-10 reps with good form.
Always warm up thoroughly before attempting heavy lifts.
Training percentages: 85-100% for strength, 70-85% for hypertrophy, <70% for endurance.
Retest your 1RM every 4-6 weeks to track progress.
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Fun Facts
"The world record bench press is over 1,100 lbs (500 kg) with equipment."
"The average untrained male can bench press about 135 lbs (61 kg)."
"A 1.5x bodyweight bench press is considered advanced for most lifters."
